21716602723 has 8 divisors (see below), whose sum is σ = 22999358592. Its totient is φ = 20434436736.

The previous prime is 21716602703. The next prime is 21716602771. The reversal of 21716602723 is 32720661712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21716602723 - 2⁹ = 21716602211 is a prime.

It is a super-3 number, since 3×21716602723³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21716602703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70515 + ... + 220012.

It is an arithmetic number, because the mean of its divisors is an integer number (2874919824).

Almost surely, 2^21716602723 is an apocalyptic number.

21716602723 is a deficient number, since it is larger than the sum of its proper divisors (1282755869).

21716602723 is a wasteful number, since it uses less digits than its factorization.

21716602723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294941.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 21716602723 in words is "twenty-one billion, seven hundred sixteen million, six hundred two thousand, seven hundred twenty-three".